1. Mustafa Khuwajakhail and Muhammad Mustafa Vayani
Joints in our body
Mustafa Khuwajakhail and Muhammad Mustafa Vayani

2. Joints in our body
In our body there are 4 joints like ball & socket joint, hinge joints, pivot joint and saddle joints.

3. Functions of Pivot joint.
Pivot joint makes us rotate a bone.

4. Function of socket joints.
Socket joint makes us do work by moving in many directions e.g. like shoulder joint helps us play.

5. Function of hinge joints
A Hinge joints works like a hinge door.

6. Function of saddle joint
A saddle joint allows a bone to slide in two directions.